The Grandmother is an analog semi-modular subtractive, 32-key synthesizer released by Moog Music Inc., incorporating circuits based on the Moog modular synthesizer Model 15 and the Minimoog. Moog’s Grandmother is a two-oscillator analog mono-synth. It has a semi-modular architecture. This means that unlike a fully modular system, it has a hard-wired (or normaled) signal path and will play without the use of patch cables. Through patching, the musician can add on, or override the hard-wired signal path, extending the possible sound palette of the synthesizer. The keyboard section of the synth includes 32 full-size keys, pitch and modulation wheels, a glide (portamento) knob, and buttons to control playback of the built-in arpeggiator/sequencer. The machine can be MIDI-controlled. Patches cannot be saved, one needs to create the sound on the fly. To remember created sounds, templates are included in the manual and in pdf format where the musician can draw the patches for later use. There are no built in patches either, but the manual shows different patches and different patch books are available.